LG URNU48GVLA2 Installation Manual page 20

Installation
3. Group Control 3
n Mixture connection with indoor units and Fresh Air Intake Unit
FAU
Master
Master
h In case of connecting with standard indoor unit and Fresh Intake Unit, separate Fresh Air
Intake Unit with standard units. (Because setting temperature are different.)
h Other than those, it is same with Group Control 1.
FAU
20 Indoor Unit
FAU
Slave
Display Error Message
FAU Standard Standard
LGAP Network System
Master
Master
FAU FAU
* FAU : Fresh Air Intake Unit
Standard: Standard Indoor Unit
GND
Signal
Slave
12 V
Standard Standard